"This important new study draws upon extensive in-depth interviewing inside the Treasury and the rest of Whitehall. The authors show how the Treasury has been winning the contest for control of welfare strategy, especially under New Labour." "In recent years the Treasury has undergone major internal changes and as part of the process officials have tried to change their style of behaviour towards Whitehall colleagues. The progress of these reforms is captured in the words of officials in both the Treasury and other departments."--Jacket.